EP1190815A1 - Method and device for dynamic lubrication of a power chuck - Google Patents

Method and device for dynamic lubrication of a power chuck Download PDF

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Publication number
EP1190815A1
EP1190815A1 EP00120607A EP00120607A EP1190815A1 EP 1190815 A1 EP1190815 A1 EP 1190815A1 EP 00120607 A EP00120607 A EP 00120607A EP 00120607 A EP00120607 A EP 00120607A EP 1190815 A1 EP1190815 A1 EP 1190815A1
Authority
EP
European Patent Office
Prior art keywords
cavity
pliers
line
power chuck
chuck
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00120607A
Other languages
German (de)
French (fr)
Other versions
EP1190815B1 (en
Inventor
Erwin Bohler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SwissChuck AG
Original Assignee
SwissChuck AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SwissChuck AG filed Critical SwissChuck AG
Priority to AT00120607T priority Critical patent/ATE255484T1/en
Priority to DE50004660T priority patent/DE50004660D1/en
Priority to EP00120607A priority patent/EP1190815B1/en
Priority to US09/951,075 priority patent/US6601856B2/en
Priority to JP2001286899A priority patent/JP4970676B2/en
Publication of EP1190815A1 publication Critical patent/EP1190815A1/en
Application granted granted Critical
Publication of EP1190815B1 publication Critical patent/EP1190815B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/121—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/16195—Jaws movement actuated by levers moved by a coaxial control rod
    • B23B31/16216—Jaws movement actuated by levers moved by a coaxial control rod using fluid-pressure means to actuate the gripping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/38—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using fluid bearings or fluid cushion supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/121—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction
    • B23Q11/122—Lubricant supply devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/12—Chucks or sockets with fluid-pressure actuator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/12—Chucks or sockets with fluid-pressure actuator
    • Y10T279/1274—Radially reciprocating jaws
    • Y10T279/1291—Fluid pressure moves jaws via mechanical connection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/19—Radially reciprocating jaws

Definitions

  • Power chucks are among other things fully automatic machine tools for manufacturing large series of very precisely processed workpieces used. Because of the high cost of maintenance they should have a long service life on the feed between successive revisions, even if they are dressed in very quick succession and again and often - for example when grinding hard steels - in an atmosphere interspersed with hard grinding dust work, which for the rapid wear of all you exposed mechanisms.
  • the mechanism is known for tightening and loosening the pliers of the feed to protect against premature wear and tear by placing it in a sealed, all or part of the cavity filled with oil enclosed inside the power chuck becomes. As a result, the wear of this - mostly hydraulic actuated - mechanism greatly reduced, and the Waiting time between successive revisions of the Forage significantly lengthened, which in mass production can be crucial.
  • a base jaw 2 is in the usual way a jaw guide (not shown) on the base body 1 attached that they are - as by the double arrow R shown - opposite radially (with respect to axis A) can move the body. She wears two Screws 3 for fastening a bakke (not shown), which together with two others (also not the jaws of the chuck are offset by 120 ° forms.
  • the radial, in the drawing vertical, movement the base jaw 2 is supported by an axis 4 swiveling angle lever 5 causes the axial displacement a hydraulically driven piston 6 in redirects the radial direction.
  • the redirection can the driving force for the pliers from the axial in the radial direction happen in other known ways about by instead of the angle lever 5 a so-called Wedge hook or other device used becomes.
  • This pressure opens up through a Known to a person skilled in the art (and only indicated schematically) Transmission mechanism 15 with a by the pressure in the release line 14 acted upon piston 13, the check valve 9 against the force of the spring 8. Also reached the pressure prevailing in the release line 14 into a second chamber 16. Since the oil through channel 11, the supply line 10 and the now open check valve 9 from the first chamber 12 can escape, the pressure moves in the second chamber 16 the piston 16 in the drawing right, the angle lever 5 pivots counterclockwise, and the base jaw 2 moves away from the axis of rotation A. As a result of the synchronous movement of the other two (not shown) in 120 ° division around the axis A. The jaws of the chuck are opened for the base jaws.
  • the angle lever 5 or about an equivalent Wedge hooks, and occasionally other, not shown, but moving parts necessary for the pliers actuation, are enclosed in a cavity 20 sealed to the outside.
  • a cavity 20 sealed to the outside.
  • the seals 22a, 22b which so the base body 1 against the base jaw 2 seal that these can be used to tension and loosen the Pliers can move back and forth without sealing the Endanger cavity.
  • everyone was further necessary to seal this cavity 20 Seals, as well as those designed for proper Works of the piston 6 are omitted.
  • the Cavity 20 contains the same oil as that for the hydraulic Pliers actuation used, and it is the following described means provided to fill this oil when operating the power chuck, especially at repeated opening and closing of the pliers, progressive to renew.
  • a feed line 21a, 21b connects the Tension line 7 with the cavity 20 and supplies it with oil when the tension line 7 is under pressure, i.e. with pliers closing or closed.
  • a nozzle 23 is inserted, which throttles the flow of oil into the cavity 20.
  • a discharge line 26 is connected with the cavity 20 the second chamber 16, which is closed or closed pliers under a lower pressure than that Tension line 7 stands, so that then oil from the cavity 20th flow into the release line 14 via the second chamber can.
  • the nozzles 23, 27 ensure that the resulting overflows of oil from the tensioning line 7 in the release line 14 for closing the pliers required pressure in the first chamber is only insignificant reduced.
  • the horizontal part 21b in the drawing of the Feed line through the part 25 shown in dashed lines be replaced, which does not lead directly into the cavity, but in a gap 24 between the base body 1 and the base jaw 2.
  • This, highly schematic in the figure shown guide gap 24 then forms Lubrication interval. It arises approximately (in not shown Way) in that the dovetail or on other way formed guide which is a radial movement the base jaw 2 enables with respect to the base body 1, has a play of a few ⁇ . If the lead gap by a seal 22a and others (not shown) seals to the outside can he also takes over the role of the nozzle 23, i.e. the Throttle oil flow from supply line 21a into the cavity. This variant makes the nozzle 23 superfluous, and also ensures that fresh oil flows through the Leading gap, what its wear when constantly opening and closing the pliers to an absolute minimum decreases.
  • the invention thus enables dynamic Fresh oil lubrication of the bell crank 5 and others Components (not shown) of the drive mechanism the pliers, including components which are strictly speaking are not within cavity 20, such as Guide rails of the base jaw 2.
  • the nozzles 23 and 27 as a function of the length of the working cycles of the pliers, the pressure in the supply and discharge lines, etc., so calibrated be that the desired amount of oil per unit of time flows through the cavity 20, namely from the tension line 7 coming and flowing into the dissolving line 14.
  • the lining according to the invention only still the supply and discharge lines, and occasionally the necessary Valves and seals on which are used for circulation the lubricant are necessary.
  • These lines can own lubrication-only pressure sources and -Sinks are connected, but they can also be used in a similar way Way as described here, but at the rear Spindle end, on a hydraulic circuit for actuation the pliers can be connected, if such exists and its force is mechanical from the spindle end is transmitted to the spindle nose.
  • the cheeks without hydraulics, for example pneumatic or electrical are operated, the lubrication circuit requires one own supply, if necessary via own rotating Connections with sealed ring grooves on the spindle end can be realized.

Abstract

The method involves circulating the lubricating fluid through a cavity (20), enclosing the chuck moving components (5,6) in sealed state, during the opening and closing movement of the power chuck. An Independent claim is also included for the power chuck.

Description

Kraftspannfutter werden unter anderem auf vollautomatischen Werkzeugmaschinen für die Herstellung grosser Serien von sehr präzise verarbeiteten Werkstücken eingesetzt. Wegen der hohen Kosten von Wartungsarbeiten an den Futtern sollten diese eine möglichst lange Standzeit zwischen aufeinanderfolgenden Revisionen erreichen, auch wenn sie in sehr rascher Folge angezogen und wieder gelöst werden, und oft - etwa beim Schleifen harter Stähle - in einer mit hartem Schleifstaub durchsetzten Atmosphäre arbeiten, welche zur raschen Abnützung aller ihr ausgesetzten Mechanismen führt. Es ist bekannt, den Mechanismus zum Spannen und Lösen der Zange des Futters vor vorzeitiger Abnützung zu schützen, indem er in einem abgedichteten, ganz oder teilweise mit Öl gefüllten Hohlraum im Inneren des Kraftspannfutters eingeschlossen wird. Dadurch wird die Abnützung dieses - meist hydraulisch betätigten - Mechanismus stark reduziert, und die Standzeit zwischen aufeinanderfolgenden Revisionen des Futters wesentlich verlängert, was bei der Massenanfertigung von entscheidender Bedeutung sein kann.Power chucks are among other things fully automatic machine tools for manufacturing large series of very precisely processed workpieces used. Because of the high cost of maintenance they should have a long service life on the feed between successive revisions, even if they are dressed in very quick succession and again and often - for example when grinding hard steels - in an atmosphere interspersed with hard grinding dust work, which for the rapid wear of all you exposed mechanisms. The mechanism is known for tightening and loosening the pliers of the feed to protect against premature wear and tear by placing it in a sealed, all or part of the cavity filled with oil enclosed inside the power chuck becomes. As a result, the wear of this - mostly hydraulic actuated - mechanism greatly reduced, and the Waiting time between successive revisions of the Forage significantly lengthened, which in mass production can be crucial.

Einer solchen statischen Schmierung durch ein eingeschlossenes Ölvolumen haften jedoch gewisse Nachteile an. Der Ölvorrat muss in regelmässigen Abständen ergänzt oder ersetzt werden, was eine wiederkehrende Wartung verlangt die bei grossen Automaten mit in der Regel schwer zugänglichem Futter kostspielig ist. Ausserdem ist es kaum möglich, ständig einen gewissen Überdruck gegenüber der Umgebung in dem notwendigerweise durch bewegliche Teile abgeschlossenen Hohlraum in welchem sich der zu schützende Mechanismus befindet, aufrechtzuerhalten, wie dies nötig wäre um das Eindringen fremder Partikel, insbesondere von Schleifstaub, gänzlich zu verhindern. Hier soll die Erfindung Abhilfe schaffen; sie soll nunmehr anhand der Beschreibung eines bevorzugten Ausführungsbeispieles und mit Hilfe der Zeichnung näher erläutert werden.Such static lubrication through a trapped oil volume has certain disadvantages on. The oil supply must be replenished at regular intervals or be replaced, which is a recurring maintenance usually requires that with large machines difficult to access feed is expensive. Also is it is hardly possible to constantly face a certain excess pressure the environment in which necessarily by moving Parts closed cavity in which the to protective mechanism located, how to maintain this would be necessary for the penetration of foreign particles, in particular of grinding dust to prevent entirely. Here the invention is intended to remedy the situation; it should now be based on the description of a preferred embodiment and be explained in more detail with the help of the drawing.

Es zeigt die einzige Figur einen stark schematisierten Längsschnitt durch ein erfindungsgemässes Kraftspannfutter, dessen Zange hydraulisch angetrieben ist. Darin bezeichnet A die Rotationsachse und 1 den Grundkörper des Futters. Bei einem Dreibackenfutter kommt die gezeigte Anordnung drei Mal, in 120°-Teilung um die Rotationsachse A verteilt, vor. Der besseren Übersicht halber zeigt die Zeichnung in ein und demselben Schnitt Leitungen, die an sich in verschiedenen, um einen bestimmten Winkel um die Rotationsachse A gedrehten Ebenen liegen müssen, damit sie aneinander vorbeikommen können, ohne einander zu durchdringen. Obwohl die Erfindung ohne weiteres auf Futter mit mehr oder weniger als drei Backen anwendbar ist, wird der Klarheit halber im folgenden nur auf die Ausführungsform mit drei Backen Bezug genommen, da diese am verbreitetsten ist.It shows the only figure a highly schematic Longitudinal section through an inventive Power chuck, the pliers of which are hydraulically driven is. A denotes the axis of rotation and 1 the Basic body of the feed. With a three-jaw chuck comes the arrangement shown three times, in 120 ° division around the Rotation axis A distributed, in front. The better overview for the sake of the drawing shows in one and the same section Lines that are in themselves different to a specific one Angle of planes rotated around the axis of rotation A. have to lie so that they can get past each other, without penetrating each other. Although the invention without further on chuck with more or less than three jaws is only applicable for the sake of clarity referring to the embodiment with three jaws, because this is the most common.

Eine Grundbacke 2 ist in üblicher Weise mittels einer (nicht gezeigten) Backenführung so am Grundkörper 1 angebracht, dass sie sich - wie durch den Doppelpfeil R gezeigt - radial (bezüglich der Achse A) gegenüber dem Grundkörper bewegen kann. Sie trägt zwei Schrauben 3 zur Befestigung einer (nicht gezeigten) Bakke, welche zusammen mit zwei weiteren (ebenfalls nicht gezeigten) um 120° versetzten Backen die Zange des Futters bildet. Die radiale, in der Zeichnung vertikale, Bewegung der Grundbacke 2 wird durch einen um eine Achse 4 schwenkbaren Winkelhebel 5 bewirkt, der die achsiale Verschiebung eines hydraulisch angetriebenen Kolbens 6 in die radiale Richtung umlenkt. Zum Schliessen der Zange, d.h. um die Grundbacke 2 in Richtung der Rotationsachse A zu bewegen, wird der Kolben 6 in der Zeichenebene nach links gedrückt. Hierfür wird, wie durch den Pfeil S angedeutet, durch eine (nicht gezeigte) in der Regel stationäre Druckquelle eine - im Folgenden kurz als Öl bezeichnete - hydraulische Flüssigkeit in eine Spannleitung 7 gepresst.A base jaw 2 is in the usual way a jaw guide (not shown) on the base body 1 attached that they are - as by the double arrow R shown - opposite radially (with respect to axis A) can move the body. She wears two Screws 3 for fastening a bakke (not shown), which together with two others (also not the jaws of the chuck are offset by 120 ° forms. The radial, in the drawing vertical, movement the base jaw 2 is supported by an axis 4 swiveling angle lever 5 causes the axial displacement a hydraulically driven piston 6 in redirects the radial direction. To close the pliers, i.e. around the base jaw 2 in the direction of the axis of rotation A to move, the piston 6 in the plane of the drawing left pressed. For this, as indicated by the arrow S, through a (not shown) usually stationary Pressure source one - hereinafter referred to as oil - hydraulic fluid in a tensioning line 7 pressed.

In anderen Ausführungsformen kann das Umlenken der Antriebskraft für die Zange von der achsialen in die radiale Richtung auf andere, bekannte Weise geschehen, etwa indem anstatt des Winkelhebels 5 ein sogenannter Keilhaken oder eine andere Vorrichtung verwendet wird.In other embodiments, the redirection can the driving force for the pliers from the axial in the radial direction happen in other known ways about by instead of the angle lever 5 a so-called Wedge hook or other device used becomes.

Die dichte Verbindung zwischen der stationären Druckquelle und der mit dem Grundkörper 1 des Futters rotierenden Spannleitung 7 geschieht in bekannter Weise über einen rotierenden Anschluss mit abgedichteten Ringnuten und ist daher hier weder gezeigt noch weiter beschrieben. Es sei jedoch bemerkt, dass solche rotierenden Anschlüsse relativ aufwendig sind und einen nicht vernachlässigbaren Platz beanspruchen, so dass es von Interesse ist, ihre Anzahl zu beschränken. Das in der Spannleitung 7 unter Druck stehende Öl gelangt über das durch eine Schraubenfeder 8 vorbelastete Kugel-Rückschlagventil 9, eine Zuleitung 10 im Grundkörper, und einen im Kolben 6 ausgesparten Kanal 11 in eine erste Kammer 12. Der Druck in dieser durch eine Arbeitsfläche des Kolbens 6 abgeschlossene Kammer treibt diesen in der Zeichnung nach links, was eine Rotation des Winkelhebels im Uhrzeigersinn und eine Verschiebung der Grundbacke 2 samt der darauf befestigten (nicht gezeigten) Zangenbacke in Richtung der Rotationsachse A erzeugt. Zusammen mit einer entsprechenden Bewegung der beiden weiteren (nicht gezeigten), um 120° versetzten Zangenbacken bewirkt dies ein Schliessen der Zange des Futters. Danach hält das Rückschlagventil 9 die Zange auch dann geschlossen, wenn der durch den Pfeil S angedeutete Druck in der Spannleitung 7 absichtlich oder unabsichtlich nachlässt. Um die Zange zu lösen wird der Druck in der Spannleitung abgebaut und eine Löseleitung 14 unter Druck gesetzt, wie durch den Pfeil L angedeutet. Dieser Druck öffnet über einen dem Fachmann bekannten (und nur schematisch angedeuteten) Übertragungsmechanismus 15 mit einer durch den Druck in der Löseleitung 14 beaufschlagten Kolben 13, das Rückschlagventil 9 gegen die Kraft der Feder 8. Ausserdem gelangt der in der Löseleitung 14 herrschende Druck in eine zweite Kammer 16. Da das Öl über den Kanal 11, die Zuleitung 10 und das nunmehr geöffnete Rückschlagventil 9 aus der ersten Kammer 12 entweichen kann, bewegt der Druck in der zweiten Kammer 16 den Kolben 16 in der Zeichnung nach rechts, der Winkelhebel 5 schwenkt im Gegenuhrzeigersinn, und die Grundbacke 2 entfernt sich von der Rotationsachse A. Infolge der synchronen Bewegung der beiden weiteren (nicht gezeigten) in 120°-Teilung um die Achse A angeordneten Grundbacken wird die Zange des Futters geöffnet. Das Prinzip der soeben beschriebenen Anordnung für eine hydraulische Betätigung der Zange eines Kraftspannfutters ist dem Fachmann bekannt. Es sollen nun die für ein solchermassen hydraulisch betätigtes Kraftspannfutter typischen Bestandteile einer Ausführungsform der Erfindung näher erläutert werden.The tight connection between the stationary Pressure source and that with the base body 1 of the feed rotating tension line 7 is done in a known manner via a rotating connection with sealed ring grooves and is therefore neither shown nor described here. However, it should be noted that such rotating Connections are relatively complex and not negligible Take up space, so it's of interest is to limit their number. That in the tension line 7 pressurized oil passes through a coil spring 8 preloaded ball check valve 9, a feed line 10 in the base body, and one in the piston 6 recessed channel 11 in a first chamber 12. The Pressure in this through a working surface of the piston 6 closed chamber drives this in the drawing left, which is a clockwise rotation of the bell crank and a displacement of the base jaw 2 together with that attached (not shown) pliers jaw in the direction the axis of rotation A. Together with a corresponding one Movement of the other two (not shown), This causes the jaws to close by 120 ° the pliers of the feed. Then the check valve stops 9 the pliers are closed even if the through the arrow S indicated pressure in the tension line 7 on purpose or unintentionally subsides. To the pliers too loosen the pressure in the tensioning line and one Release line 14 pressurized as by the Arrow L indicated. This pressure opens up through a Known to a person skilled in the art (and only indicated schematically) Transmission mechanism 15 with a by the pressure in the release line 14 acted upon piston 13, the check valve 9 against the force of the spring 8. Also reached the pressure prevailing in the release line 14 into a second chamber 16. Since the oil through channel 11, the supply line 10 and the now open check valve 9 from the first chamber 12 can escape, the pressure moves in the second chamber 16 the piston 16 in the drawing right, the angle lever 5 pivots counterclockwise, and the base jaw 2 moves away from the axis of rotation A. As a result of the synchronous movement of the other two (not shown) in 120 ° division around the axis A. The jaws of the chuck are opened for the base jaws. The principle of the arrangement just described for one hydraulic actuation of the forceps of a power chuck is known to the person skilled in the art. It should now be for such a degree hydraulically operated power chuck typical Components of an embodiment of the invention are explained in more detail.

Der Winkelhebel 5 oder etwa ein äquivalenter Keilhaken, sowie fallweise andere, nicht gezeigte, aber für die Zangenbetätigung notwendige, bewegliche Teile, sind in einem nach aussen abgedichteten Hohlraum 20 eingeschlossen. Von den dafür nötigen Dichtungsstellen sind nur zwei als Beispiele gezeigt, nämlich die Dichtungen 22a, 22b, welche den Grundkörper 1 so gegen die Grundbakke 2 abdichten, dass sich diese zum Spannen und Lösen der Zange hin und her bewegen kann, ohne die Abdichtung des Hohlraumes zu gefährden. Der Klarheit halber wurden alle weiteren zur Abdichtung dieses Hohlraumes 20 notwendigen Dichtungen, wie auch diejenigen die für ein ordnungsgemässes Arbeiten des Kolbens 6 nötig sind, ausgelassen. Der Hohlraum 20 enthält dasselbe Öl wie das für die hydraulische Zangenbetätigung verwendete, und es sind die im Folgenden beschriebenen Mittel vorgesehen, um diese Ölfüllung beim Betrieb des Kraftspannfutters, insbesondere bei wiederholtem Öffnen und Schliessen der Zange, progressiv zu erneuern.The angle lever 5 or about an equivalent Wedge hooks, and occasionally other, not shown, but moving parts necessary for the pliers actuation, are enclosed in a cavity 20 sealed to the outside. Of the necessary sealing points only two shown as examples, namely the seals 22a, 22b, which so the base body 1 against the base jaw 2 seal that these can be used to tension and loosen the Pliers can move back and forth without sealing the Endanger cavity. For the sake of clarity, everyone was further necessary to seal this cavity 20 Seals, as well as those designed for proper Works of the piston 6 are omitted. The Cavity 20 contains the same oil as that for the hydraulic Pliers actuation used, and it is the following described means provided to fill this oil when operating the power chuck, especially at repeated opening and closing of the pliers, progressive to renew.

Eine Zuführleitung 21a, 21b verbindet die Spannleitung 7 mit dem Hohlraum 20 und versorgt diesen mit Öl, wenn die Spannleitung 7 unter Druck steht, d.h. bei sich schliessender oder geschlossener Zange. Im Zuführleitungsteil 21b ist eine Düse 23 eingesetzt, welche den Zufluss von Öl in den Hohlraum 20 drosselt. Des weiteren verbindet eine Abführleitung 26 den Hohlraum 20 mit der zweiten Kammer 16, die bei sich schliessender oder geschlossener Zange unter einem geringeren Druck als die Spannleitung 7 steht, so dass dann Öl aus dem Hohlraum 20 über die zweite Kammer in die Löseleitung 14 abfliessen kann. Solange die Zange durch einen Überdruck in der Spannleitung 7 gespannt wird entsteht daher ein gewisser Durchfluss von Öl durch den Hohlraum 20, wobei eine in der Abführleitung 26 eingesetzte Düse 27 im Zusammenspiel mit der Düse 23 diesen von der Spannleitung 7 über den Hohlraum 20 zur Löseleitung 14 stattfindenden Durchfluss regelt. Ausserdem sorgen die Düsen 23, 27 dafür, dass das so entstehende Überströmen von Öl aus der Spannleitung 7 in die Löseleitung 14 den für das Schliessen der Zange benötigten Druck in der ersten Kammer nur unwesentlich vermindert.A feed line 21a, 21b connects the Tension line 7 with the cavity 20 and supplies it with oil when the tension line 7 is under pressure, i.e. with pliers closing or closed. In the supply line part 21b, a nozzle 23 is inserted, which throttles the flow of oil into the cavity 20. Furthermore connects a discharge line 26 with the cavity 20 the second chamber 16, which is closed or closed pliers under a lower pressure than that Tension line 7 stands, so that then oil from the cavity 20th flow into the release line 14 via the second chamber can. As long as the pliers are overpressured in the Tension line 7 is therefore created a certain Flow of oil through cavity 20, one in the discharge line 26 used nozzle 27 in interaction with the nozzle 23 this from the tension line 7 via the Cavity 20 to the dissolving line 14 flow taking place regulates. In addition, the nozzles 23, 27 ensure that the resulting overflows of oil from the tensioning line 7 in the release line 14 for closing the pliers required pressure in the first chamber is only insignificant reduced.

In einer weiteren, vorteilhaften Ausführungsweise kann der in der Zeichnung horizontale Teil 21b der Zuführleitung durch den gestrichelt gezeichneten Teil 25 ersetzt werden, der nicht direkt in den Hohlraum führt, sondern in einen Spalt 24 zwischen dem Grundkörper 1 und der Grundbacke 2. Dieser, in der Figur stark schematisiert dargestellte Führungsspalt 24 bildet dann ein Schmierintervall. Es entsteht etwa (in nicht gezeigter Weise) dadurch, dass die als Schwalbenschwanz oder auf andere Weise gebildeten Führung, welche eine radiale Bewegung der Grundbacke 2 bezüglich des Grundkörpers 1 ermöglicht, ein Spiel von einigen µ aufweist. Wenn der Führungsspalt durch eine Dichtung 22a sowie weitere (nicht gezeigte) Dichtungen nach aussen abgeschlossen ist, kann er ausserdem die Rolle der Düse 23 übernehmen, d.h. den Ölfluss aus der Zuführleitung 21a in den Hohlraum drosseln. Diese Variante macht die Düse 23 überflüssig, und sorgt gleichzeitig für einen Fluss von Frischöl durch den Führungsspalt, was dessen Abnützung bei ständigem Öffnen und Schliessen der Zange auf ein absolutes Mindestmass herabsetzt.In a further advantageous embodiment can the horizontal part 21b in the drawing of the Feed line through the part 25 shown in dashed lines be replaced, which does not lead directly into the cavity, but in a gap 24 between the base body 1 and the base jaw 2. This, highly schematic in the figure shown guide gap 24 then forms Lubrication interval. It arises approximately (in not shown Way) in that the dovetail or on other way formed guide which is a radial movement the base jaw 2 enables with respect to the base body 1, has a play of a few µ. If the lead gap by a seal 22a and others (not shown) seals to the outside can he also takes over the role of the nozzle 23, i.e. the Throttle oil flow from supply line 21a into the cavity. This variant makes the nozzle 23 superfluous, and also ensures that fresh oil flows through the Leading gap, what its wear when constantly opening and closing the pliers to an absolute minimum decreases.

Es sei jetzt der Zustand betrachtet, wenn zum Öffnen der Zange der Druck in der Löseleitung 14 denjenigen in der Spannleitung 7 übersteigt. Dann strömt Öl in entgegengesetzter Richtung, von der Löseleitung 14 über die Abführleitung 26, den Hohlraum 20 und die Zuführleitung 21a, 21b oder 25 zur Spannleitung 7. Falls eine exakte Symmetrie aller Strömungen bestünde und bei aufeinanderfolgenden Arbeitszyklen des Spannfutters die Öffnungsdauer der Zange genau gleich lang wie ihre Schliessdauer wäre, stünde das Öl im Hohlraum 20 zwar in erwünschter Weise unter Druck, es würde aber nur durch den Hohlraum hin und her gespült, ohne progressiv erneuert zu werden. Solche eine perfekte Symmetrie kommt jedoch in der Praxis sozusagen niemals vor, so dass praktisch immer mit einer allmählichen Erneuerung des Öles im Hohlraum, d.h. mit einer dynamischen Frischöl-Schmierung des Winkelhebels S und seiner Zubehöre gerechnet werden kann. Insbesondere ändert sich aus konstruktiven Gründen bei der Bewegung des Kolbens 6 das Volumen des Hohlraumes 20 fast zwangsläufig, wodurch die Symmetrie zwischen dem Öffnungs- und dem Schliessvorgang der Zange zerstört wird, weil bei einer Verkleinerung des Volumens mehr Öl aus dem Hohlraum heraus als in diesen hineinfliesst. Dadurch könnte im Hohlraum ein unerwünscht hoher Druck auftreten, und es zeigt die Figur wie dies vermieden werden kann.Let us consider the state now when Opening the pliers the pressure in the release line 14 one exceeds 7 in the tensioning line. Then oil flows in opposite direction, from the release line 14 over the discharge line 26, the cavity 20 and the supply line 21a, 21b or 25 to the tensioning line 7. If an exact There would be symmetry of all currents and of successive ones Working cycles of the chuck the opening time the pliers have exactly the same length as their closing time would be, the oil in the cavity 20 would be desirable Way under pressure, but it would only be through the Cavity flushed back and forth without being progressively renewed become. Such perfect symmetry, however, comes in practice so to speak never before, so practically always with a gradual renewal of the oil in the cavity, i.e. with dynamic fresh oil lubrication of the bell crank S and its accessories can be expected. In particular, changes for structural reasons the movement of the piston 6 the volume of the cavity 20th almost inevitably, reducing the symmetry between the Opening and closing of the pliers destroyed becomes because with a decrease in volume more oil out of the cavity as it flows into it. Thereby an undesirably high pressure could occur in the cavity, and it shows the figure how to avoid this can.

Wie weiter oben beschrieben, bewegt sich beim Öffnen der Zange der Kolben 6 nach rechts, wodurch in der hier gezeigten Ausführungsform das Volumen des Hohlraumes 20 verkleinert wird. Um einen übermässigen Druck im Hohlraum zu vermeiden ist eine mit einem zweiten Rückschlagventil 31 versehene Entlastungsleitung 30 vorgesehen, die den Hohlraum mit einem oberhalb des ersten Rückschlagventiles 9 liegenden Teil der Spannleitung 7 verbindet. Über die Entlastungsleitung 30 kann das überschüssige Öl in die bei sich öffnenden Zange drucklose Spannleitung 7 befördert werden. Beim Schliessen der Zange verhindert das in der Entlastungsleitung 30 vorgesehene zweite Rückschlagventil 31 eine direkt Übertragung des in der Spannleitung 7 aufgebauten Druckes in den Hohlraum.As described above, moves at Open the pliers of the piston 6 to the right, which in the Embodiment shown here, the volume of the cavity 20 is reduced. To excessive pressure in the cavity avoid with a second check valve 31 provided relief line 30, the the cavity with one above the first check valve 9 lying part of the tension line 7 connects. about the relief line 30 can the excess oil in the unpressurized tension line 7 is conveyed when the tongs open become. This prevents when the pliers are closed second check valve provided in the relief line 30 31 a direct transmission of the in the tension line 7 pressure built up in the cavity.

Es ermöglicht also die Erfindung eine dynamische Frischöl-Schmierung des Winkelhebels 5 und anderer (nicht gezeigter) Bestandteile des Antriebsmechanismus der Zange, inklusive von Bestandteilen welche strenggenommen nicht innerhalb des Hohlraumes 20 liegen, wie etwa Führungsschienen der Grundbacke 2. Es können die Düsen 23 und 27 in Funktion der Länge der Arbeitszyklen der Zange, des Druckes in den Zu- und Ableitungen etc., so kalibriert werden, dass pro Zeiteinheit die gewünschte Ölmenge durch den Hohlraum 20 fliesst, und zwar von der Spannleitung 7 kommend und in die Löseleitung 14 abfliessend. Es sei jedoch bemerkt, dass durch eine entsprechende Anordnung der Leitungen und Ventile ein Fluss in umgekehrter Richtung erzeugt werden kann sofern dies vorteilhaft erscheint, insbesondere für Futter bei denen das Volumen des den Antriebsmechanismus der Zange enthaltenden Hohlraumes beim Schliessen der Zange abnimmt, anstatt wie im hier beschriebenen Beispiel beim Öffnen derselben.The invention thus enables dynamic Fresh oil lubrication of the bell crank 5 and others Components (not shown) of the drive mechanism the pliers, including components which are strictly speaking are not within cavity 20, such as Guide rails of the base jaw 2. The nozzles 23 and 27 as a function of the length of the working cycles of the pliers, the pressure in the supply and discharge lines, etc., so calibrated be that the desired amount of oil per unit of time flows through the cavity 20, namely from the tension line 7 coming and flowing into the dissolving line 14. However, it should be noted that by an appropriate arrangement the pipes and valves flow in reverse Direction can be generated if this is advantageous appears, especially for feed where the volume of the cavity containing the drive mechanism of the pliers decreases when closing the pliers instead of as in Example described here when opening the same.

Es hat sich gezeigt, dass die Verwendung desselben Öles sowohl für die hydraulische Betätigung der Zange des Kraftspannfutters wie für die dynamische Schmierung des Antriebsmechanismus der Zange keine Probleme aufwirft, und dass handelsübliche hydraulische Flüssigkeiten dafür geeignet sind. Obwohl ein kombiniertes Leitungssystem für die Zangenbetätigung und für eine dynamische Schmierung besonders vorteilhaft ist, sei abschliessend noch erwähnt, dass die erfindungsgemässe Schmierung auch für Futter angewendet werden kann, deren Spannbacken nicht hydraulisch sondern auf andere Weise - beispielsweise magnetisch oder rein mechanisch - angetrieben sind. Dies gilt insbesonders für Futter mit einer sogenannten "Hinterend-Betätigung", bei welcher die in der Regel pneumatisch, hydraulisch oder elektrisch erzeugte Kraft für die Betätigung der Zange nicht wie im hier gezeigten Beispiel innerhalb des Futters, d.h. nahe bei der Spindelnase in eine mechanische Kraft umgesetzt wird, sondern am hinteren Spindelende. Dort wird dann mittels Kolben, Elektromotore oder anderen Mitteln eine mechanische Kraft erzeugt, die durch Kabel, Gestänge oder dergleichen innerhalb der Spindel bis zur Spindelnase, und dort bis zu den Backen des Futters geführt wird. Es fallen dann im Futter alle hier gezeigten Mittel für die Übertragung einer hydraulischen Kraft sowie für deren Umsetzung in eine mechanische Kraft weg, und es bleiben in der Regel nur Mittel zur mechanischen Umlenkung von achsialen Antriebskräften in die radiale Bewegungsrichtungen der Backen. Dann weist das erfindungsgemässe Futter nur noch die Zu- und Abführleitungen, sowie fallweise die nötigen Ventile und Dichtungen auf, welche für den Umlauf der Schmierflüssigkeit nötig sind. Diese Leitungen können an eigene, nur der Schmierung dienende Druck-Quellen und -Senken angeschlossen sein, sie können aber auch in ähnlicher Weise wie hier beschrieben, jedoch am hinteren Spindelende, an einem hydraulischen Kreislauf für die Betätigung der Zange angeschlossen werden, falls ein solcher existiert und seine Kraft mechanisch vom Spindelende zur Spindelnase übertragen wird. Falls jedoch die Backen ohne Hydraulik, beispielsweise pneumatisch oder elektrisch, betätigt werden, benötigt der Schmierkreis eine eigene Versorgung, die nötigenfalls über eigene rotierende Anschlüsse mit abgedichteten Ringnuten am Spindelende realisiert werden kann. It has been shown that the use of the same Oil for both the hydraulic actuation of the Forceps of the power chuck as for the dynamic Lubrication of the pliers drive mechanism is not a problem poses, and that commercial hydraulic Liquids are suitable for this. Although a combined Line system for the pliers actuation and for one dynamic lubrication is particularly advantageous, be conclusive still mentioned that the inventive Lubrication can also be applied to feed whose Clamping jaws not hydraulic, but in a different way - For example, magnetically or purely mechanically - driven are. This applies in particular to feed with a so-called "rear end operation", in which the in usually generated pneumatically, hydraulically or electrically Force for the operation of the pliers not as in Example shown here within the feed, i.e. Near converted into a mechanical force in the spindle nose but at the rear end of the spindle. Then there by means of pistons, electric motors or other means mechanical force generated by cables, rods or the like within the spindle to the spindle nose, and is led up to the cheeks of the food. It then all the funds shown here fall in the feed for the Transmission of a hydraulic force and its implementation in a mechanical force away and it remains in usually only means for mechanical deflection of axial Driving forces in the radial directions of movement the cheeks. Then the lining according to the invention only still the supply and discharge lines, and occasionally the necessary Valves and seals on which are used for circulation the lubricant are necessary. These lines can own lubrication-only pressure sources and -Sinks are connected, but they can also be used in a similar way Way as described here, but at the rear Spindle end, on a hydraulic circuit for actuation the pliers can be connected, if such exists and its force is mechanical from the spindle end is transmitted to the spindle nose. However, if the cheeks without hydraulics, for example pneumatic or electrical, are operated, the lubrication circuit requires one own supply, if necessary via own rotating Connections with sealed ring grooves on the spindle end can be realized.

Es hat sich erwiesen, dass mit der erfindungsgemässen dynamischen Schmierung extrem hohe Standzeiten des Kraftspannfutters ohne messbare Abnützung des Zangenmechanismus erreicht werden können. Dadurch wird nicht nur eine Wartung des Futters praktisch hinfällig, was für Gross-Serien wesentlich ist, sondern es wird indirekt die Präzision der Verarbeitung erhöht indem durch Wegfall von Abnützung der Schliessdruck der Zange ohne Nacheinstellung konstant bleibt, was über extrem viele Zyklen exakt reproduzierbare Arbeitsgänge der mit einem erfindungsgemässen Futter bestückten Werkzeugmaschine ermöglicht. Zudem verlangt die erfindungsgemässe Schmierung bei Futtern mit hydraulisch angetriebener Zange keinen zusätzlichen rotierenden Anschluss zwischen mit dem Futter rotierenden Leitungen und stationären Druckquellen oder -Senken.It has been found that with the dynamic lubrication extremely long service life of the power chuck without measurable wear of the Pliers mechanism can be achieved. This will not only does maintenance of the feed practically become obsolete, which is essential for large series, but it becomes indirect by increasing the precision of the processing Elimination of wear of the closing pressure of the pliers without Readjustment remains constant, which is extremely many Cycles of exactly reproducible operations with one Machine tool equipped according to the invention. In addition, the lubrication according to the invention requires none with chucks with hydraulically driven tongs additional rotating connection between with the chuck rotating lines and stationary pressure sources or sinks.

Claims (13)

Verfahren zum Schmieren von gegenseitig beweglichen Organe eines (auf dem Spindelstock einer Werkzeugmaschine angebrachten) Kraftspannfutters, dadurch gekennzeichnet, dass diese Organe in einem nach aussen im wesentlichen abgedichteten Hohlraum untergebracht sind oder an diesen angrenzen, und dass während des Betriebes des Futters ein schmierendes Fluid dem Hohlraum zugeführt und aus diesem abgeführt wird.Method for lubricating mutually movable organs of a power chuck (mounted on the headstock of a machine tool), characterized in that these organs are accommodated in or adjoin a cavity which is essentially sealed to the outside, and that a lubricating fluid detects the lubricant during operation of the chuck Cavity is supplied and removed from this. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Druck des schmierenden Fluids im Hohlraum mindestens zeitweise den atmosphärischen Druck übersteigt.A method according to claim 1, characterized in that the pressure of the lubricating fluid in the cavity at least temporarily exceeds the atmospheric pressure. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das Schmierintervall der Führung mindestens einer Zangenbacke des Futters vom Hohlraum her mit schmierendem Fluid versorgt wird.A method according to claim 2, characterized in that the lubrication interval of the guide of at least one jaw of the chuck is supplied with lubricating fluid from the cavity. Verfahren nach einem der vorangehenden Ansprüche für ein Futter mit hydraulisch betätigter Zange, dadurch gekennzeichnet, dass die Zu- und Abfuhr von Fluid durch die beim Öffnen und Schliessen der Zange im hydraulischen Betätigungskreis derselben auftretenden Druckunterschiede bewirkt wird.Method according to one of the preceding claims for a chuck with hydraulically operated pliers, characterized in that the supply and removal of fluid is effected by the pressure differences occurring in the hydraulic actuating circuit when the pliers are opened and closed. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das im hydraulischen Kreis wirkende Fluid als schmierendes Fluid verwendet wird.A method according to claim 4, characterized in that the fluid acting in the hydraulic circuit is used as a lubricating fluid. Kraftspannfutter mit beweglichen Organen zum Öffnen und Schliessen seiner Zange, dadurch gekennzeichnet, dass mindestens ein Organ in einem nach aussen im wesentlichen abgedichteten Hohlraum untergebracht ist, der mindestens zeitweise durch mindestens eine Zuführleitung mit einer Quelle für ein schmierendes Fluid verbinden ist.Power chuck with movable members for opening and closing its pliers, characterized in that at least one member is accommodated in a cavity which is essentially sealed to the outside and which is at least temporarily connected to a source of a lubricating fluid by at least one feed line. Kraftspannfutter nach Anspruch 6, dadurch gekennzeichnet, dass das Schmierintervall der Führung mindestens einer Zangenbacke des Futters an den Hohlraum angrenzt.Power chuck according to claim 6, characterized in that the lubrication interval of the guide of at least one jaw of the chuck adjoins the cavity. Kraftspannfutter nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass der Hohlraum mindestens zeitweise durch mindestens eine Abführleitung mit einer Senke für das schmierende Fluid verbunden ist.Power chuck according to claim 6 or 7, characterized in that the cavity is at least temporarily connected by at least one discharge line to a sink for the lubricating fluid. Kraftspannfutter nach Anspruch 8, dadurch gekennzeichnet, dass seine Zange hydraulisch betätigbar ist und dass die Zuführ- und die Abführleitung am hydraulischen Betätigungskreis der Zange angeschlossen sind.Power chuck according to claim 8, characterized in that its pliers can be actuated hydraulically and that the feed and discharge lines are connected to the hydraulic actuating circuit of the pliers. Kraftspannfutter nach Anspruch 9, dadurch gekennzeichnet, dass mindestens ein Teil der Organe Mechanismen zur Übertragung hydraulischer Betätigungskräfte auf die Zange sind.Power chuck according to claim 9, characterized in that at least some of the organs are mechanisms for transmitting hydraulic actuating forces to the pliers. Kraftspannfutter nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass der hydraulische Betätigungskreis mindestens eine mit einem ersten Rückschlagventil versehene Spannleitung zur Übertragung des für das Schliessen der Zange notwendigen Druckes sowie eine den Hohlraum mit der Spannleitung verbindende Entlastungsleitung aufweist, die ein zweites Rückschlagventil enthält und stromaufwärts des ersten Rückschlagventiles in die Spannleitung mündet.Power chuck according to claim 9 or 10, characterized in that the hydraulic actuating circuit has at least one clamping line provided with a first check valve for transmitting the pressure necessary for closing the pliers and a relief line connecting the cavity with the clamping line, which contains a second check valve and upstream of the first check valve opens into the tension line. Kraftspannfutter nach Ansprch 9 oder 10, dadurch gekennzeichnet, dass der hydraulische Betätigungskreis mindestens eine Löseleitung zur Übertragung des für das Öffnen der Zange notwendigen Druckes sowie eine den Hohlraum mit der Löseleitung verbindende Entlastungsleitung aufweist.Power chuck according to claim 9 or 10, characterized in that the hydraulic actuating circuit has at least one release line for transmitting the pressure necessary for opening the pliers and a relief line connecting the cavity with the release line. Kraftspannfutter nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass in der Zuführ- und/oder in der Abführleitung eine drosselnde Düse angebracht ist.Power chuck according to one of claims 8 to 12, characterized in that a throttling nozzle is attached in the feed and / or in the discharge line.
EP00120607A 2000-09-21 2000-09-21 Method and device for dynamic lubrication of a power chuck Expired - Lifetime EP1190815B1 (en)

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AT00120607T ATE255484T1 (en) 2000-09-21 2000-09-21 METHOD AND DEVICE FOR DYNAMIC LUBRICATION OF A POWERFUL CHUCK
DE50004660T DE50004660D1 (en) 2000-09-21 2000-09-21 Method and device for dynamic lubrication of a power chuck
EP00120607A EP1190815B1 (en) 2000-09-21 2000-09-21 Method and device for dynamic lubrication of a power chuck
US09/951,075 US6601856B2 (en) 2000-09-21 2001-09-12 Method and device for the dynamic lubrication of a power chuck
JP2001286899A JP4970676B2 (en) 2000-09-21 2001-09-20 Dynamic lubrication method and apparatus for power chuck

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EP00120607A EP1190815B1 (en) 2000-09-21 2000-09-21 Method and device for dynamic lubrication of a power chuck

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019111281A1 (en) * 2019-05-02 2020-11-05 Haimer Gmbh Hydraulically clampable tool / workpiece holder
US11247278B2 (en) 2019-05-02 2022-02-15 Haimer Gmbh Hydraulically clampable tool holder or workpiece holder

Also Published As

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US6601856B2 (en) 2003-08-05
DE50004660D1 (en) 2004-01-15
ATE255484T1 (en) 2003-12-15
JP4970676B2 (en) 2012-07-11
JP2002144115A (en) 2002-05-21
EP1190815B1 (en) 2003-12-03
US20020033582A1 (en) 2002-03-21

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